Rinne and Denizens of the Crimson Realm

Friagne / Kariudo ( "The Hunter") (Crimson Lord)

Friagne, also known as "Flame Haze Murderer", takes his name's meaning as his hobby, "treasure hunter". He is a powerful Tomogara arrayed in robes of untarnishable white. Unlike other Tomogara, he doesn't associate with the organizations like Bal Masqué. He has very intimate relationship with his favorite doll, Marianne. He came to Misaki City to perform a notorious Power of Unrestraint "City Devourer" to gain the power of existence enough to make Marianne a fully independent being, instead of a Rinne which needs to depend on its master just to exist. He has a vast collection of Treasure Items (powerful tools or implements contained within Mystes), pictured as mountain of treasure in an extra story in Guren (Itou Noizi artbook), of which all are useless. This is also the reason for his having the largest collection of hougu: most are not the highly sought battle-use Hougu. He later meets his end at the hands of Shana. In all media except for TV anime, he was incinerated by the wrath of Alastor, who had materialized when the enraged Friagne shot Shana with the Triggerhappy which couldn't destroy her body like it did with many other Flame Hazes.

Marianne (Rinne)

Marianne is one of Friagne's Rinne servants. Friagne seems to treasure her a bit more than is healthy for him. She usually takes the form of a doll. In order to buy time to complete the sequence of the "City Devourer", she fought Shana and exploded for the love of her master.

Lamies ( "Corpse Retriever" / "The Spiral Organ") (Crimson Denizen)

Lamies is the Torch of an old man under the control of a Crimson Denizen as means to travel in secrecy. Lamies collects the Power of Existence from torches on the verge of flickering out and is a rare one among Denizens due to respecting the balance and does not simply feed on people. As the nickname 'Corpse Retriever' indicates, he only draws power from torches that would perish any moment anyway. Lamies is a master wizard, renowned for past feats of creating the most prominent Power of Unrestraint (Jizai Hou), including the Seal itself. He is an old acquaintance of Alastor, but does not take part in battles.

The name of the Crimson Denizen herself is "Rasen no Fuukin (The Spiral Organ)"; in the past, she used the name Leanan-sidhe, and assumed the form of a young girl who fell in love with a human painter, who unfortunately caught her consuming humans one day, a possible reason that made her stop eating humans later on. She was captured and imprisoned by a Crimson Lord for so many years that upon being released, she found out that the painter, who still loved her, had died of old age. He had drawn a picture of the Spiral Organ but it had been damaged beyond repair, so now she seeks to gather enough power of existence to hopefully one day activate a Power of Unrestraint that would restore the painting.

Sorath / Aizenji "He who Loves Himself") (Crimson Denizen)

Sorath is an extravagant occidental looking boy with a beautiful hair, continuously perplexed despite being Tiriel's elder brother, and is subject to the passion and whims of his younger sister. With the "Butsuyoku" (an arms type hougu) he uses "the olfactory sense of desire" to seek powers of existence. He is armed with a sword called "Blutsauger" (German for "blood drinker"), which is capable of damaging anything that it touches if a user channels power of existence into it. He is obsessed with, and is searching for the "Nietono no Shana" (Shana's Sword). His obsession with the sword proved to be his undoing in the end.

Tiriel / Aizenta ("Engulfed in Love for Others") (Crimson Denizen)

Tiriel is Sorath's younger sister. Though being the younger one, she thinks and acts in a much more mature way and teaches everything to her almost will-less brother. Their relationship is most likely incestuous; Tiriel has stated that her only goal in life is to fulfill every desire of her 'onii-sama' and to protect him. She will do so without regrets, even if it means sacrificing her power of existence, or even her own life. But she is also a very jealous girl, strangling Sorath near death when he had spoken of names of other females, such as "Hecate". She can use a Power of Unrestraint called "Cradle Garden" with the aid of a Treasure Tool, which alters a Seal so its area becomes an advantage to the siblings. Shana was disgusted with their way of expressing love, yet she was greatly moved by Tiriel's self-sacrifice, learning from her the "Uncontrollable feeling".

Merihim a.k.a Shiro / Niji no Tsubasa ( "Rainbow Wings") (Crimson Lord)

Merihim is one of the nine lords that gathered under Toten Glocke (Tomurai no Kane^?), the greatest Denizen organization before Bal-Masque founded and lead by the late Lord "Hitugi no Orite" ( "Weaver of Coffin") Asiz. Merihim and the dragon shaped Lord "Kōtetsuryū" ("Iron shell dragon") Illuyanka were feared as the "Pair of Wings", being the most powerful subordinates of Asiz. It was then when he gained the title Niji no Kenshi ( "Rainbow Swordsman"). Wirhelmina loves him, but Merihim is crazily in love with Mathilde, who in turn, loved Alastor. To fulfill his promise to the woman he loved, he changed shape into the skeleton Shana known as Shiro and trained the next successor of "Enpatsu Shakugan no Uchite" title. His promise is his only motivation, however.

Dantalion / Tantankyuukyuu ("The Discovery-Addicted Utmost-Researcher") (Crimson Lord)

Dantalion is a stereotypical mad scientist. Dantalion is not liked, even hated by most Denizens, even among the Bal Masque, because he would do research on their own people　and also being responsible for an experiment which created some of the powerful Flame Hazes. Among the Trinity, Bel Peol does not like or trust him and Sydonay hates him, but somehow Hecate seems close to him, even calling him "ojisama" (the greeting toward uncles or respectable seniors) and protected him most of the time from getting into trouble with the higher-ups. He doesn't care who he works with, Denizens, humans, or even Flame Hazes, as long as if it's necessary to do whatever that he's interested in, even ruining them at the end is an option. He created a lot of gadgets, from creatures like the "Rinne" Cantate Domino 28 (a parody of Tetsujin 28) to huge steam locomotive. He's also notorious for conducting meaningless experiments, for the sake of conducting experiments, which in the end serves no actual useful purpose but to cause exaggerated alert to others. He hates shiitake mushroom, but he hates Bel Peol and a Flame Haze "Puppeteer of Devilish Skills" Sale Habichtsburg more.

Pheles / Saihyou ("Colorful Flutter") (Crimson Lord)

Once a trickster who toyed with the life of a mad alchemist, Pheles is a lord who fell in love with a human, Johan the alchemist's son. In order to stay with him forever, they created the most precious treasure in Guze, a Treasure that can grant eternity to the Mystes bearing it: the Reiji Maigo. Due to the Reiji Maigo, she doesn't need to consume other humans' power of existence; she can get enough to survive from Johan without him being in danger of disappearing. Due to a fight against the Bal Masque's assassin Sabrac that severely wounded Johan, she sealed her lover into the Reiji Maigo. She was unaware that Sabrac had also placed the Silver into the Hougu simultaneously. The Reiji Maigo was then lost, so now she searches for him everywhere with a Power of Unrestraint “The Wheel of Wind” (Kaze no Tenrin), a guiding beacon that becomes a duplicate of her own when the target is found. Johan commandeers Yuji's body to persuade her from sacrificing the current Mystes to bring him back and Pheles agrees to her lover's wish before leaving for parts unknown. Before she left, Pheles gives Yoshida a cross Hougu called the Giralda.

She is friends with Wirhelmina who once she had saved from the trap set by the Denizen Lord Sabrac. She does not appear in the first season of the anime but appears in the second season around the end of episode twelve amid her search for the Reiji Maigo. She tries to free Johan the first time, only to be interrupted by Margery's berserk rage as well as the coordinated actions of Wirhelmina and Shana. The second time Pheles tried to free Johan from within the Reiji Maigo, she gets impaled by the Silver's arm, thus unwittingly calling forth Fecor, Konoe, and Hecate.

Mare / Gisuikyō ("Village of Jestful Slumber") (Crimson Denizen)

Mare also appears in the second season of the anime, where she uses a hougu to place Yuji into a "transient yet eternal" dream world where he relives events from his past as if they were happening all over again.

Annaberg / Sentetsu no Hora ( "Completely Piercing Cavern") (Crimson Denizen)

Annaberg is a Denizen who is truly fascinated by human civilization and creations, yet he is bent on destroying them in order to accelerate the speed of evolution. He has unique appearance as his head is a round pressure gage and has fingers like poking stick, wearing trenchcoat and a soft hat. He can create steam from his sleeves, which conceal one's presence or the power of existence, though this skill sometimes backfire on himself allowing his enemy to make a surprise attack.

He appeared in New York in 1930's, with Sydonay as his bodyguard, planning to destroy the Empire State Building, but was stopped by Margery and defeated by Yuri.

Sabrac / Kaijin ( "Blade Breaker") (Crimson Lord)

Sabrac is a powerful Crimson Lord who was victorious in numerous battles against the Flame Haze. He is literally an assassin, for he is usually seen receiving requests to kill a certain target of interest; his heavily armored, face-covered, and leather-bandaged outward looks also add to the fact. He likes to make long fancy-talk speeches, and while he is seen dissatisfied many times, it is hard to see him in a wrath. His hobby is collecting bladed weapons from swords to katanas whether they are Treasure Tools or not, and he actively used them in fights. He and Dantalion loathe each other, for the latter transfigured Sabrac's Treasure blade Hystorix into a blade-spinning drill-like contraption without permission, and the blade's owner badly insulted the mad scientist for this.

During combat, his first strike is notorious for its insensibility even to the most sensitive Flame Haze nor Denizen, and that it can be cast at an unlimited number of targets with each strike at maximum power. His Power of Unrestraint, the Stigma, causes all wounds he inflicts to increase in size over time. This spell built for battle is fatal for most targets, and even if he/she might be strong, the target's fate is unsure, and even if have survived, the piling amount of wounds will eventually bring Sabrac his victory.

Sabrac is actually an unbalanced Lord with a ridiculously gigantic body, yet with the range of sight, hearing, and other senses only as much as human. He hides his body by blending into the area he has chosen for battlefield, enabling him to launch a surprise attack without being detected. The humanoid Sabrac that appears after the first strike does possess the very mind of Sabrac, though it is almost invulnerable because it is only a figure created from small part of his body. As such, it can near infinitely endure or recover from any damage.

Hired by Bal Masqué, he hunted down the Engage Link and casted a part of "Psalm of Grand Order" into Reiji Maigo. He was again hired by Bel Peol and went to Misaki City, badly wounding the Flame Hazes by surprise attack and sets another part of the "Psalm" into Yuji. But his arrogance had let Wirhelmina succeed in curing the Stigma, and Yuji to speculate Sabrac's secret and comes up with a plan to defeat him by ripping the figure along with few city blocks away from the true body, therefore cutting off his power of recovery and his retreat. By the teamwork of Flame Hazes, Sabrac was defeated, but he managed to escape to Seireiden with the power of Gordian Knot. Later, Sabrac is shown speaking with Bel Peol and announcing that he no longer has a reason to have his base at Seireiden.